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______his number for an hour only to hear a busy signal, she became impatient an
______his number for an hour only to hear a busy signal, she became impatient an
游客
2025-03-20
11
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问题
______his number for an hour only to hear a busy signal, she became impatient and called the operator for assistance.
选项
A、Dialing
B、Dialed
C、Having dialed
D、To dial
答案
C
解析
本题考查非谓语动词,独立结构的逻辑主语与主句主语相同,所以用现在分词的完成时态。题意为,已经拨了一个小时他的号码都只是听到忙音,她不耐烦起来,打电话请接线员帮忙。
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